Empty the carafe and filter basket after each brew

The fastest way to keep your Mr. Coffee running well is to clean it right after you use it. While the machine is still warm (but not hot), remove the carafe and pour out any leftover coffee. Take out the filter basket — it usually lifts straight up — and throw away the used filter and grounds.

Rinse the carafe with warm water and a soft cloth or sponge. If coffee has stained the glass, a paste of baking soda and water will lift the stain without scratching. Rinse the filter basket under running water and let both parts air-dry before you put them back.

Key Takeaways

  • Empty and rinse the carafe and filter basket when ready after brewing to prevent stains and mold growth.
  • Run white vinegar through the brew cycle once a month to dissolve mineral buildup inside the heating element and tubes.
  • The water reservoir, carafe, and filter basket are safe to wash by hand with warm soapy water, but do not submerge the machine itself.
  • If water drips slowly or stops flowing, mineral deposits are blocking the internal tubes — vinegar descaling will restore normal flow.
  • Never use bleach, abrasive scrubbers, or the dishwasher on any Mr. Coffee part, as these damage the plastic and metal components.

Run vinegar through the machine monthly to remove mineral buildup

Over time, minerals from tap water collect inside the heating element and tubes of your Mr. Coffee. This buildup slows the brew cycle and can eventually stop water from flowing through altogether. The fix is a vinegar descale, which you should do once a month if you have hard water, or every two months with soft water.

Fill the water reservoir with equal parts white vinegar and water — a standard 12-cup Mr. Coffee holds about 60 ounces, so use 30 ounces of each. Place an empty carafe on the warming plate. Turn on the machine and let it brew halfway through the cycle, then turn it off and let it sit for 15 minutes. This gives the vinegar time to soak the mineral deposits. Turn the machine back on and let the rest of the vinegar solution brew into the carafe.

After the vinegar cycle finishes, empty the carafe and run two full cycles of plain water through the machine with no coffee or filter. This rinses out the vinegar smell and any remaining mineral particles. Your Mr. Coffee should now brew at normal speed again.

Wash the water reservoir and carafe with warm soapy water

The water reservoir — the plastic tank on top where you pour water — can be removed and washed by hand. Lift it straight up and out, then rinse it under warm running water. If you see algae or mold growing inside (usually a green or black film), scrub it gently with a soft brush or cloth and a little dish soap, then rinse thoroughly.

The carafe itself is glass and can handle warm soapy water and a soft sponge. Never put it in the dishwasher, because the heat can damage the measurement markings printed on the side. The filter basket is plastic and should also be hand-washed with warm water and soap, then air-dried before you put it back in the machine.

Clean the warming plate to prevent buildup and staining

The warming plate at the base of your Mr. Coffee can develop a ring of dried coffee and mineral deposits. Unplug the machine and let it cool completely. Dampen a soft cloth with warm water and a tiny drop of dish soap, then wipe the plate gently. For stubborn stains, make a paste of baking soda and water and rub it on with a cloth, then wipe clean with a damp cloth.

Never scrub the warming plate with a hard brush or scouring pad, because you can scratch the surface and make it less effective at keeping your coffee warm. If the plate is cracked or no longer heats evenly, it may need to be replaced — contact Mr. Coffee customer service for a replacement part.

Check the spray head and brew basket for clogs

The spray head is the small perforated piece at the top of the brew basket that distributes water evenly over the grounds. If water is pooling on one side of the filter or not wetting the grounds evenly, the spray head may be clogged with mineral deposits or old coffee residue.

Unplug the machine and let it cool. Lift out the filter basket and look at the spray head — it is usually a small plastic or metal disc with tiny holes. If you see white crusty buildup, soak a cloth in white vinegar and hold it against the spray head for a few minutes, then use a soft brush or old toothbrush to gently scrub the holes. Rinse with clean water. If the holes are still blocked, run a vinegar descale cycle as described above, which will dissolve the deposits throughout the machine.

What not to do when cleaning your Mr. Coffee

Never submerge the main machine body in water or put it in the dishwasher. The electrical components and heating element can be damaged by water, and the machine will not work safely afterward. Only the carafe, filter basket, and water reservoir are meant to be removed and washed separately.

Do not use bleach, abrasive scrubbers, scouring powder, or harsh chemical cleaners on any part of your Mr. Coffee. These can damage the plastic, corrode the metal, and leave residue that ends up in your coffee. Stick to white vinegar, baking soda, warm water, and soft cloths. If you spill coffee inside the machine body, unplug it when ready and let it dry for at least 24 hours before plugging it back in — do not try to clean the inside yourself.

Frequently Asked Questions

How often should I clean my Mr. Coffee maker?

Empty and rinse the carafe and filter basket after every use. Run a vinegar descale cycle once a month if you have hard water, or every two months with soft water. Wipe the warming plate weekly to prevent staining.

Why is my Mr. Coffee brewing slowly?

Mineral buildup inside the heating element and tubes is the most common cause. Run a vinegar descale cycle as described above. If the machine still brews slowly after two descale cycles, the heating element may be failing and the machine may need to be replaced.

Can I use a Mr. Coffee maker if it has mold in the water reservoir?

Yes, but clean it first. Remove the reservoir, scrub the mold with a soft brush and a mixture of equal parts white vinegar and water, then rinse thoroughly. Run two full cycles of plain water through the machine before brewing coffee again.

Is it safe to use vinegar in my Mr. Coffee maker?

Yes, white vinegar is safe and recommended for descaling. It dissolves mineral deposits without damaging the machine. Always rinse with two full cycles of plain water afterward to remove the vinegar smell and taste.

What should I do if water leaks from the bottom of my Mr. Coffee?

Unplug the machine and let it cool. Check that the carafe is seated properly on the warming plate and that the filter basket is fully inserted. If water still leaks, the internal seal may be worn out and the machine will likely need to be replaced.